Funk Motorsport BMW B58 Turbo Blanket For BMW M140i, M240i, 340i, 440i & more

Maximise thermal efficiency and protect your engine bay with the Funk Motorsport Turbo Blanket for BMW and Toyota models equipped with the B58 single-turbo engine. Designed specifically for the complex twin-scroll turbocharger found in the B58 platform, this turbo blanket delivers superior heat management, improves turbo performance, and helps extend the life of nearby components.

Crafted using a highly durable multi-layer construction — including a volcanic rock-based outer layer and stainless steel internal mesh — this turbo blanket is engineered to withstand sustained temperatures of up to 1300°C. By retaining heat within the turbo housing, it reduces heat soak, promotes quicker spool-up, and improves overall engine response, especially under high-performance conditions.

Whether you're running a stock B58 engine or a tuned setup, this turbo blanket is a must-have upgrade to unlock reliable performance and keep under-bonnet temperatures under control. Supplied with stainless steel locking wire for secure installation and proudly developed in the UK.

Notably, this turbo blanket is not single-use and can be removed and refitted during routine servicing.

Key Features:

• Engineered specifically for B58 single twin-scroll turbo engines
• Significantly reduces engine bay heat and improves reliability
• Supports improved turbo spool and throttle response
• Rated to withstand continuous temperatures of up to 1300°C
• Multi-layer construction with volcanic rock-based fabric
• Stainless steel mesh inner layer for enhanced durability
• Includes stainless steel locking wire for secure installation
• Designed, tested and developed in the UK

Specifications:

• Max Temperature Rating: 1300°C
• Material: Volcanic rock-based fabric + stainless steel mesh
• Fitment: Direct fit for B58 turbocharger
• Includes: 1 Turbo Blanket + Locking Wire

Compatibility (B58 Engine Models):

• BMW M140i
• BMW M240i
• BMW 340i
• BMW 440i
• BMW 540i
• BMW 640i
• BMW X3 M40i
• BMW X4 M40i
• BMW X5 40i
• BMW X7 40i
• BMW Z4 M40i
• Toyota GR Supra (A90/A91)

Install Guide:

Unless explicitly stated otherwise, all products sold by R44 Performance Limited are designated RACE ONLY and are solely for competition or off-road use limited to racing formally sanctioned by a recognized racing organization. Any other use, including recreational off-road use, may violate local, state, and Federal laws. R44 Performance Limited does not implicitly or explicitly confirm the legality of using any products it sells on public roads; that is entirely the responsibility of the consumer.

It is the responsibility of the customer to check with all federal, state local and environmental laws before ordering and installing a product. R44 Performance Limited is not responsible for any fees, fines or costs that a customer may incur as a result of failing to check with federal, state, local or environmental laws before ordering and installing a product.

We get a large number of custom orders and requests everyday, so as a result it is not always possible for us to keep every item in stock at all times in our warehouse. If you require the item urgently please contact our sales team here to check the stock before you make your purchase.

We totally understand if you're not certain a part will be compatible with your car, so we highly recommend contacting us here with your query. Our friendly sales team will then be in touch to confirm if this part is the correct part you are looking for.

All in stock products ship the same day if ordered before 2pm GMT

For out of stock items we will contact you with an estimated wait time if not otherwise specified above.

We offer worldwide shipping on all products. If upon receiving your product you wish to return; we offer a 30-day returns policy. For our in-depth returns information please follow the link. "R44 Returns Policy

All of our products come with a standard warranty of 1-3 years. This is dependant on the type of product however. For more details please see our warranty page here.